My Personal Contribution to SIX SIGMA
I know what is expected of my process. I am familiar with the requirements of the internal and external customers.
I am familiar with the measurements that show how well my process meets requirements.
I respond to deviations by taking corrective measures and tracking their progress.
I collaborate with the owners of the upstream and downstream processes.
I inform my line manager of any serious or recurring deviations.
I participate constructively in improvement teams and contribute creative and innovative ideas to solve problems and make improvements.
I am familiar with and utilise the DMAIC problem-solving method in order to:� determine the cause of a deviation� take effective corrective measures� achieve continual improvement
cp: this process capability index shows the ratio between the specified spread and the actualspread of a process.
cpk: this process capability index indicates the potential of a process to meet its specification. Thehigher the value, the more likely the entire production lies within specification. A cpk of at least 1.3is desirable for a well-controlled process. A SIX SIGMA process exhibits a cpk of 2.
DMAIC: abbreviation for the five phases of the SIX SIGMAproblem-solving method: Define, Measure, Analyse, Improve and Control.
Poka Yoke: Japanese term which stands for mistake-proof-ing. The technique involves preventing errors by taking simpleyet imaginative measures or by recognising errors at the pointof occurrence.
ppm: abbreviation for parts per million. By the same token thatone percentage (%) point is one hundredth, one ppm is one millionth. We use ppm when measuring the error/defect rate ofa process:
A SIX SIGMA process exhibits an error rate of 3.4 defects permillion defect opportunities
SCO: safety, cleanliness and order form the basis of excellent process quality. Safety repre-sentatives and process managers make regular tours to monitor the actual state of safety, clean-liness and order. Results are then evaluated and improvements are implemented.
SIX SIGMA: Definitions and Terms
SCHURTER AGWerkhofstrasse 8-12 | Postfach 4769 | CH-6002 LucerneTel. ++41 +41 369 31 11 | Fax. ++41 +41 369 33 [email protected] | www.schurter.com
SCHURTER distinguishes itselfthrough the excellent quality of its processes. The SIX SIGMAmethods enable us to enhancecustomer benefit and strengthen our market position on a continuousbasis.
SIX SIGMA
We deploy SIX SIGMA’s system-atic problem-solving methodDMAIC to improve our processes.At the same time, we also system-atically eliminate waste of any kind.
We base our decisions on dataand facts. We identify the needs of our customers, measure processoutput, analyse results and takecorrective action.
The successes we achievethrough SIX SIGMA are real and tangible. We gain new knowledge, insights and experi-ences and encourage others to participate.
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For more details of SCHURTER’s Quality ManagementSystem, visit www.schurter.com
Rolf Nussbaumer, Quality Management Manager, looksforward to answering any questions you may have:[email protected]
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LSL x
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USL
x = mean s = standard deviation LSL = lower specification limit USL = upper specification limit
cp = LSL - USL6 x s
cpk = min ( x - LSL, USL - x )3 x s
=Error rate x 1000 000number of defects number of defect opportunities
DefineDescribing the problem and the improvement goal� What is the cause?� What is the problem?� What is the goal?� How do we know the goal
has been achieved?
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The problem, the goal and the success criteria have been defined clearly and concisely
� Action plan, minutes of meetings� Cost-benefit calculation
� Has the problem been defined clearly and concisely?
� Have neither cause nor solution been anticipated?
� Is the target clearly described?� Have the metrics been determined?� Has a target value to be achieved
been determined?
MeasureCollecting data and facts to identify the actual situation and to become familiar withthe process� How is the process defined?� What is influencing the process?� What outputs does the process yield?
A concise process description has been established
� Action plan, minutes of meetings� SIPOC process flow diagram� Measurement list� Measurement system capability� Process control chart� Histogram� Run chart
� Has the problem been defined clearly andconcisely?
� Have all functions and sub-processes invol-ved been taken into account?
� Is the actual situation supported by data?� Is the data meaningful?� Is the measuring method reliable?
AnalyzeIdentifying influencing factors based on thedata and facts. Determining how the mainfactors influence the process� Identify possible causes� Identify root causes� Establish cause/effect relationships
The influencing factors have been deter-mined and their impact on the process isknown
� Action plan, minutes of meetings� Brainstorming� Fishbone/Ishikawa diagram� (Process-) FMEA, Fault Tree� 5 x why� Test planning� Hypothesis test
� Has the data been thoroughly explored?� Have all possible causes/impacts
been identified?� Have the root causes been identified based
on data and facts?
ImproveFinding solutions to eliminate the effect of theimpacts and thereby improve the process� Identify opportunities for improvement� Plan and implement tests� Implement and measure process
improvements
Measures to make continual improvementsto the process have been introduced
� Action plan, minutes of meetings� Brainstorming� Poka Yoke� (Process-) FMEA� Process control chart� Histogram� Run chart� Before/after analysis
� Have various solutions been identified?� Have meaningful tests been conducted?� Is the improvement verified and
effective?
ControlFacilitating continual improvement so as toachieve long-term process improvement� Document the improvement� Inform stakeholders� Initiate process verification
A profoundly improved, controlled and veri-fied process has been established
� Action plan, minutes of meetings� Yield/savings evidence� Work and test instruction� Process visualisation and monitoring� Poka Yoke measures� Tool/robotics modifications� Automation� Design changes
Will the improvements introduced have a continual effect?� Has improvement verification been
initiated?� Have all stakeholders been informed
of the changes?� Are the experiences gained also available
to third parties?
